Biology Forum Genetics Genes

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    • #1009
      Waters2
      Participant

      what is pleiotropy???and also Epistosis????Can anyone tell me???pls

    • #23117
      EmmVeePee
      Participant

      Pleiotropy is when a gene has more than one phenotypic expression. There are plenty of examples, but I can’t think of any.

      I assume you mean Epistasis. Epistasis is when one gene controls whether another is expressed or not. But it isn;t like dominance and recessive genes, where the dominant one trumps the recessive.

    • #23135
      victor
      Participant

      I can think that Epistasis is some kinda dominance that expressed when two or more alleles which controlling one phenotype (usually color phenotype) meet each other (when two organisms are mated). In this matter Epistasis can be detected when two dominant alleles meet each other but only one of them is shown as phenotype. In this case another allele which is ‘beaten’ by the Epistasis allele is called hipostasis.

    • #23228
      Waters2
      Participant

      I think i get a bit of image of it but can u give me a related website so i can know more about it….. 🙂

    • #23376
      thank.darwin
      Participant

      These sites should help…

      http://www.ndsu.nodak.edu/instruct/mccl … endel6.htm

      http://www.ndsu.nodak.edu/instruct/mccl … endel5.htm

    • #23516
      Waters2
      Participant

      thank u for ur information…

    • #23749
      kandarp shah
      Participant

      as my knowledge i have found that One gene that causes many different physical traits such as multiple disease symptoms.

    • #30340
      jadsky
      Participant

      go to http//www.yahoo.com and search for your help chances are you’ll get answers

    • #91579
      bortz99
      Participant

      Sickle-cell disease is a good example of pleiotrophy, the carrier of this recessive trait will have a phenotype of lets say Ss but they do not have Sickle-cell symptoms like the SS phenotype. However even in the Ss type some sickle-cells are created this is why they are resistant to malaria.

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